Magnetic properties of MnSb inclusions formed in GaSb matrix directly during molecular beam epitaxial growth

Krystyna Lawniczak-Jablonska , Anna Wolska , Marcin T. Klepka , Slawomir Kret , Jacek Gosk , Andrzej Twardowski , Dariusz Wasik , Adam Kwiatkowski , Boguslawa Kurowska , Bogdan J. Kowalski , Janusz Sadowski

Abstract

Despite of intensive search for the proper semiconductor base materials for spintronic devices working at room temperature no appropriate material based on ferromagnetic semiconductors has been found so far. We demonstrate that the phase segregated system with MnSb hexagonal inclusions inside the GaSb matrix, formed directly during the molecular beam epitaxial growth reveals the ferromagnetic properties at room temperature and is a good candidate for exploitation in spintronics. Furthermore, the MnSb inclusions with only one crystalline structure were identified in this GaMn:MnSb granular material. The SQUID magnetometry confirmed that this material exhibits ferromagnetic like behavior starting from helium up to room temperature. Moreover, the magnetic anisotropy was found which was present also at room temperature, and it was proved that by choosing a proper substrate it is possible to control the direction of easy axis of inclusions \#x2019; magnetization moment between in-plane and out-of-plane; the latter is important in view of potential applications in spintronic devices.
Author Krystyna Lawniczak-Jablonska
Krystyna Lawniczak-Jablonska,,
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, Anna Wolska
Anna Wolska,,
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, Marcin T. Klepka
Marcin T. Klepka,,
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, Slawomir Kret
Slawomir Kret,,
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, Jacek Gosk ZBW
Jacek Gosk,,
- High Pressure Research Division
, Andrzej Twardowski
Andrzej Twardowski,,
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, Dariusz Wasik
Dariusz Wasik,,
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, Adam Kwiatkowski
Adam Kwiatkowski,,
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, Boguslawa Kurowska
Boguslawa Kurowska,,
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, Bogdan J. Kowalski
Bogdan J. Kowalski,,
-
et al.`
Journal seriesJournal of Applied Physics, ISSN 0021-8979
Issue year2011
Vol109
No7
Pages074308-074308-7
Keywords in Englishantimony alloys, gallium alloys, inclusions, magnetic anisotropy, magnetic transitions, magnetoelectronics, manganese alloys, molecular beam epitaxial growth, semimagnetic semiconductors, SQUID magnetometers
DOIDOI:10.1063/1.3562171
Score (nominal)35
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2011 = 2.168 (2) - 2011=2.169 (5)
Citation count*7 (2015-04-09)
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